I should add the the only exception is if you have a full size spare (less height), a rear strut brace or the battery relocated to the boot, so it might have these in the way but the length will be the same.

Thanks for the replies all!I'm pretty keen to put it in the boot so it doesn't wreck the seats, so it's really the width and height of the window between the boot and back seat that matters.I was of the understanding that the ralliart had a more limited boot because of the strut brace and AWD